Lawn-mower.



122mm.v LAWN MOWER.

APPLICATION FILED 00T. 1l, 1912. v

Patented Oct. 28, 1913.

2 SHEETS-SHEET 2.

@UM-MW www ira sra FRED Yeux, or SEATTLE, wasunveToN.

LAWN-MOVVER.

Specification of Letters Patent.

Patented. st. 28,1913.

Application filed October 11, 1912. Serial No.. 725,226.

. of the United States, residing at Seattle, in

Aeo

the county of King and State of Tashington, have invented new and usefulImprovements in Lawn-Mowers, of which the following is a specification.

This invention relates to lawn mowers, and itv has particular referenceto a. lawn mower provided with reciprocatory cutting apparatus.

The invention has for its prime object to 'produce a simple and eectiveframe tosupport the reciprocatory cutting apparatus and the groundwheels from which motion is transmitted to said cutting apparatus.

A further object of the invention is to simplify and improve thetransmission mechanism whereby the members of the cutting apparatus areoppositely reciprocated.

With these and other ends in view which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement of parts which will behereinafter fully described and particularly pointed out in the claims.

In the accompanying drawings has been illustrated a simple and preferredform of the invention, it being, however, understood that no limitationis necessarily madey to the precise structural details thereinexhibited, but that changes, alterations and modilications within thescope of the claims may be resorted to when desired.

In the drawings,-Figure 1 is a top plan view of a lawn mower constructedin accordance with the invention. Fig. 2 is a vertical sectional viewtaken on the line 2 2 in Fig. 1. Fig. 3 is a perspective detail view,showing one end of the bottom member of the cutting apparatus.

Corresponding parts in the several figures are denoted by likecharacters o-f reference.

The frame of the improved machine comprises inverted V-shaped sidemembers provided at the apices thereof with bearings 1 for the mainshaft 2. Each side member includes forwardly and rearwardly extendinglimbs designated, respectively, 3 and 4, and the forwardly extendinglimbs 3 are made relatively wide or broad so as to constitute bracketssupporting the shoe or housing 5 wherein the members of the cuttingapparatus are mounted. The cutting apparatus comprises the lower andupper members 6 and 7, each having forwardly extending triangular teeth8, the opposed faces of which are perfectly fiat and disposed inintimate contact with each other, that is to say, the upper faces of theteeth of the bottom member 6 contact with the lower faces of the teethof the top member 7. The opposed faces of the members 6 and 7 areprovided with grooves 9 for the reception of antifriction balls 10,whereby the operation is greatly facilitated.` rlhe Ibottom member 6 ofthe cutting apparatus is provided with a pin or stud 11 that extendsupwardly through a slot 12 in the top member 7, near one end thereofSaid top member is provided near the opposite end thereof with anupwardly extending pin 13.

The boxes or bearing members 1 at the apices of the'side mem ers of theframe are provided with pins or studs 14 on which levers 15 arefulcrumed. levers carries two rollers 16 disposed equidistantly from thefulcrum, and said rollers are in engagement with diametrically oppositeportions of a corrugated flange 17 formed on the side face of andextending laterally from the proximate ground wheel 18, the groundwheels being mounted on the axle, as shown, and the corrugated flangesbeingv formed on the inner faces thereof. The corrugated flanges are,moreover, formed in such fashion that when one of the rollers 16 of eachlever 15 engages a tooth or projection, the opposite roller of saidlever will engage a space between two projections; thus, when the groundwheels are rotated, the levers 15 are rocked or vibrated. Thearrangement, moreover, is of such a nature that the lower ends of thelevers 15 will move simultaneously toward each other and likewise apartfrom each other, thereby causing the members 6 and 7 of the cuttingapparatus to be moved in opposite directions so that the blades of grassentering between the teeth will be clipped or sheared, as will bereadily understood. The rearwardly extending limbs 4 of the side membersof the frame are provided with vertically adjustable supports 19 for theroller 20, said supports being held adjustably by means of set screws21. Lugs or keepers 22 are formed on the bearing numbers 1 for thereception of the handle members 23, and lugs or eyes 24 are formed onthe rear limbs 11 of the side members for engagement with handle braces25.

Each of saidV From the foregoing description, taken in connection withthe drawings hereto annexed, the operation and advantages of thisinvention will be readily understood.

The cutting apparatus may be made ot' any desired width so as to cut awide swath in advance of the ground wheels, thereby avoiding thecrushing of the grass by the latter previous to being cut.

The general construction ot the device is very simple, and a light,durable and highly effective lawn mower may be produced at a moderateexpense..

Having thus described the invention, what is claimed as new, is

1. ln a lawn mower, a frame including side members having trent and rearlimbs, and bearing members at the convergence of said front and rearlimbs, an axle supported in the bearing members, ground wheels on theaxle, said ground wheels having laterally extending corrugated flangeson the inner faces thereof, levers tulcrumed on the bearing members andengaging diametrically opposite portions of the corrugated flanges, topand bottom cutting members supported :tor reciprocation on the frontlimbs of the trame members, the top member being provided with a slot, apin extending from the bottom member through the slot of the top memberand connected pivotally with one of the levers, a pin extending from thetop member and connected pivotally with the other lever, said leversbeing so arranged and actuated that the top and bottom cutting i emberswill operate in opposition and a housing on the iront limbs of the tramemembers to inclose the cutting apparatus.

L). ln a lawn mower, a trame including side members having front andrear limbs and provided with bearing members at the convergence of saidlimbs, a cutting apparatus including two reciprocatory members supportedon the 1front limbs et the trame members, a roller supported adjustablyon the rear limbs of the trame members, an axle supported in the bearingmembers, ground wheels mounted on the axle and provided with corrugatedflanges on their inner f faces, and levers fulcrumedl on the bearingmembers, each lever being provided with rollers equidistant from thetulerum thereof in engagement with the corrugated flange of theproximate ground wheel, said levers being connected with the respectivemembers of the cutting apparat-us to move said members in oppositedirections.

ln testimony whereof l aflix my signa ture in presence of two witnesses.

FRED YANK. Witnesses ELnis A. VRIGHT, RUTH LUNDGREN.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, l

Washington, D. C.

